. Cave vertebrates of America; a study in degenerative evolution. Cave animals; Heteropygii. THE BLIND TYPHLOGOBIUS OF CALIFORNIA. 65 TYPHLOGOBIUS: THE POINT LOMA BLIND FISH AND ITS RELATIVES. San Diego Bay is in part surrounded by mud flats which are covered by water at high tide. Sand beaches take the place of the mud flats where the channel approaches the shores. On the ocean shores a sandy beach stretches several miles to the southeast from the mouth of the bay, while on the west rises the point of land called Point Loma. The entire ocean beach at the base of this promontory is rocky. In m
. Cave vertebrates of America; a study in degenerative evolution. Cave animals; Heteropygii. THE BLIND TYPHLOGOBIUS OF CALIFORNIA. 65 TYPHLOGOBIUS: THE POINT LOMA BLIND FISH AND ITS RELATIVES. San Diego Bay is in part surrounded by mud flats which are covered by water at high tide. Sand beaches take the place of the mud flats where the channel approaches the shores. On the ocean shores a sandy beach stretches several miles to the southeast from the mouth of the bay, while on the west rises the point of land called Point Loma. The entire ocean beach at the base of this promontory is rocky. In many places all the earth has been removed by the action of the waves, leaving the bare rock; in other places, and more especially between the outer point and Ballast Point, large bowlders lie embedded in the sand (frontispiece). These are all covered at high tide, while but a few small pools remain about the T' --:v *tiB£&. *$ W^M0. Fig. 25. (a) Young Gillichlhys mirabilis Girard. From mud flats of San Diego Bay. (b) Larva of Clevelandia or Lepidvgobius. From surface of San Diego Bay. (c) Clei<elandia ios Jordan and Gilbert. From San Diego Bay. (d) Quietula y-cauda Jenkins and Evermann. From San Diego Bay. rocks at low tide. Many of these rocks are covered with seaweeds, actineans, and especially large chitons. All these localities are inhabited by relatives of the Point Loma blind fish. The sloughs traversing the mud flats of the bay are inhabited by Gillichthys mirabilis Cooper, the young of which is represented in figure 25 a. In the mud flats every tide pool as large as a man's hand contains Clevelandia ios (fig. 25 c); nearer low-water mark in similar localities Quietula y-cauda are found, but less abundant than Clevelandia ios. On digging in the sandy beaches of the bay specimens of another species of this group, Ilypnus gilberti, are some- times found buried in the sand. In the crab holes under the rocks about Point Loma occurs the most remarkable of this family,
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